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lymorkiew45
sage
Reged: 12/30/07
Posts: 288
Loc: Anaheim
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This planetery nebula is in Cygnus, and is a protoplanetary, it is faint, and very small, the magnitude of this object is 13.7, and it spans 19"/14" and plus a 12th magnitude star touches it's tip, making this object that much more difficult to see, in my 12" scope the Egg appears very small, elongated NNE, SSW and appears to be similair to the appearance of a double star, and on a good night a faint halo can be seen surrounding the main body, it has a faint greenish color to it, and could be difficult to find...clear skies 
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sgottlieb
sage
Reged: 07/22/07
Posts: 232
Loc: SF Bay area
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I've only seen this object referred to as the "Egg Nebula" or the "Cygnus Egg Nebula" in the professional journals.
Here's my first observation --
13" (7/20/85): the "Egg Nebula" appears as a faint double object easily visible at 220x, elongated SSW-NNE. The SSW component is quasi-stellar and faint while the NNE component is brighter and slightly non-stellar. This unusual object does not respond to OIII, UHC or H-beta filters. Located 4.1' ESE of mag 7.7 SAO 70809.
And my last...
18" (8/12/07): the "Egg Nebula" was viewed at 450x as this object is quite small but has a high surface brightness. This bipolar protoplanetary consists of two small round knots oriented SSW-NNE with the brighter component on the NNE end. This 12th magnitude knot appears ~10" in size with an occasional star or stellar point at the center. Just SSW is a much fainter mag 14 knot, ~6" in size and the two components are encased in a very faint, elongated halo so the dimmer component just stands out individually. Located just 4' east of mag 8 HD 200371.
Since the central star isn't hot enough to ionize the gas in the lobes, the light is primarily reflected though highly polarized. Anyone try a polarizing filter on this object?
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Steve Gottlieb
18" f/4.3 Starmaster
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BillFerris
Carpal Tunnel
Reged: 07/17/04
Posts: 2549
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PK 80-6.1 (aka the Egg Nebula) is a visually interesting object in my 18 inch. Here are my notes: In the 18-inch Obsession at 520X, the Egg nebula appears elongated north-northeast to south-southwest in two sections. The northern nebulous section appears both larger and brighter to the eye. It's 12" by 10" in size. The southern section may be smaller but it is somewhat more interesting. The nebulous patch is just 10" wide at the base and tapers to a point about 10" to the south. It looks like a flame licking at the night sky. A pair of faint stars, separated by 21", is seen west of this southern portion of the Egg Nebula. There's a 12th magnitude star located about 2'.5 north of the nebula; it's a pretty wide separation at high power.
And here's a link to my sketch: PK 80-6.1.
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MessierScott
super member
Reged: 06/18/07
Posts: 180
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Egg Nebula - CRL 2688
June 2006
20-inch at 279x
Excellent seeing
"No central star seen in this bi-polar planetary. Easy seeing with direct vision, averted vision expands it a bit more. No filters helped. This object has a dark narrow gap with lobes, or wings extending to the NNE and SSW directions. The NNE lobe is much brighter, extends further out, and seemed to be more pointed at the far end. A faint star is just to the WSW of this planetary. Actually a very pretty planetary nebula!"
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Scott Kranz
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Darren Drake
Pooh-Bah
Reged: 10/09/02
Posts: 1022
Loc: Illinois
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What is the exact coordinates of this one? I saw it from my light polluted back yard and want to see it from dark skies. Thanks
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MessierScott
super member
Reged: 06/18/07
Posts: 180
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21 02 18.80
+36 41 37.0
J2000
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Scott Kranz
20-inch f/4.3 Starmaster w/Zambuto mirror, Feathertouch focuser, GO TO & tracking
7-inch Starmaster
H-alpha Coronado PST
Denkmeier II binoviewers w/24mm Panoptics
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reiner
member
Reged: 09/28/05
Posts: 30
Loc: Freiburg, Germany
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Quote:
Anyone try a polarizing filter on this object?
Hi Steve,
I tried it a few weeks ago with my 14", when I observed several protoPN.
It responds very well to the polarizing filter, the brightness goes down to less than half (maybe to one third). I also tried the polarizer on Minkowski's footprint with little to no effect.
Cheers
Reiner
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Reiner
22" and 14" Dobsons on EQ platforms
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sgottlieb
sage
Reged: 07/22/07
Posts: 232
Loc: SF Bay area
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Quote:
Quote:
Anyone try a polarizing filter on this object?
Hi Steve,
I tried it a few weeks ago with my 14", when I observed several protoPN.
It responds very well to the polarizing filter, the brightness goes down to less than half (maybe to one third). I also tried the polarizer on Minkowski's footprint with little to no effect.
Cheers
Reiner
Thanks, Reiner, for your observation. I'll have to give it a try. What other proto-PN did you look for besides Minkowski's footprint?
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Steve Gottlieb
18" f/4.3 Starmaster
Adventures In Deep Space - New article on MASH planetaries
7500+ NGC/IC Visual Descriptions
NGC/IC Project
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reiner
member
Reged: 09/28/05
Posts: 30
Loc: Freiburg, Germany
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I also observed NGC 7027, which is by some sources also classified as a protoPN, though it appears to be ionized, and some other exotic non-PPN objects, such as Campbell's hydrogen star and (unsuccessfully) Sh2-106, an HII region that looks very much like a small bipolar PN. I wanted to try Minkowski's butterfly, which should also be well polarized, but didn't have enough time (moon came up). Some time before, I had observed Frosty Leo (but had not checked for polarization at that time).
Do you know the essay by Martin Schoenball about protoPNs?
http://www.schoenball.de/astronomie/projekte/ppn/ppn_en.htm
In his paper are some other nice objects of which some should be accessible for visual observing.
Reiner
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Reiner
22" and 14" Dobsons on EQ platforms
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